BIM (Building Information Modelling)
A digital process for creating and managing information about a building throughout its lifecycle, using a shared 3D model that contains geometric and data attributes for all building elements.
Building Information Modelling (BIM) is a process for creating, managing, and sharing information about a building using a coordinated digital model. A BIM model goes beyond a 3D drawing to include data attributes for every element — material specification, fire rating, maintenance schedule, supplier information, and more. The model is used across all phases of a building's life: design, construction, and operation.
In UK construction, BIM has been mandated by government policy for centrally-funded public sector projects since 2016, driving widespread adoption across the industry. The standard framework is defined by ISO 19650 (replacing BS 1192 and PAS 1192), which specifies how information should be structured, managed, and exchanged throughout the project lifecycle.
The practical output of a BIM process is a federated model — a coordination model that combines the structural engineer's model, the architect's model, and the M&E engineer's model into a single coordinated view. This coordination model is used to identify clashes between systems before construction begins, reducing the cost and disruption of on-site changes.
For structural engineers and building surveyors, the relevance of BIM extends beyond design coordination to condition monitoring and asset management. As-built BIM models — produced at project completion and handed over to the building owner — should in principle contain all the information needed to manage and maintain the building. In practice, the quality and completeness of handover BIM varies enormously, and the models are frequently not used for operational asset management in the way originally intended.
The gap between the BIM model and physical site condition grows over time as maintenance is carried out, alterations are made, and elements deteriorate. Photographic condition surveys — particularly 360° surveys pinned to floor plan drawings — provide a practical way to bridge this gap: they document the physical reality of the building as it exists at a point in time, complementing the digital model with visual evidence that the model cannot contain.
Related Terms
A drawing that records the structure or building as it was actually constructed, including any modifications made during construction, rather than as it was originally designed.
A dynamic digital replica of a physical asset that is continuously updated with real-world data, allowing the asset to be monitored, analysed, and simulated without physical intervention.
A scaled drawing showing the layout of a single floor of a building as seen from above, indicating the position of walls, columns, rooms, openings, and structural elements.
A survey that records the precise dimensions of a building or space, producing dimensionally accurate drawings that reflect existing conditions rather than design intent.
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pin360 lets you pin 360° photos directly onto PDF floor plans — making every survey spatially navigable. Used by structural engineers and building surveyors.
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